tree 4706819e23ade99c43bb676830071da9bd2d0abd
parent dd180b3e90253cb4ca95d603a8c17413f8daec69
author Avi Kivity <avi@redhat.com> 1275823887 +0300
committer Avi Kivity <avi@redhat.com> 1280720417 +0300

KVM: MMU: Introduce drop_spte()

When we call rmap_remove(), we (almost) always immediately follow it by
an __set_spte() to a nonpresent pte.  Since we need to perform the two
operations atomically, to avoid losing the dirty and accessed bits, introduce
a helper drop_spte() and convert all call sites.

The operation is still nonatomic at this point.

Signed-off-by: Avi Kivity <avi@redhat.com>